do loop until 10 times

Hi all i an new to Autoit

i want to make a script that search for a pic and click it 

and repeate that for 10 times i had readed the help doc and some postes in the forums but no luck

the search and click itself is working but i cant get the loop to work

any ideas ?

#include <ImageSearch.au3>

$x = 0
$y = 0


$NUM = 0
While $NUM <= 10
   
Func start()
  
  Do
$Search = _ImageSearch('pic.bmp', 0, $x, $y, 0)

if $Search = 0 Then sleep (1000)
Until $Search = 1
If $Search = 1 Then
 MouseMove($x, $y,10)
 MouseClick("left", $x, $y, 1)
 EndIf
EndFunc


WEnd

when i run this code it give the following error